In a clear sign of continuing long-term climate change associated with record atmospheric concentrations of greenhouse gases, 2015, 2016, 2017 and 2018 have been confirmed as the four warmest years on record.

The long-term warming trend has continued in 2018, with the average global temperature set to be the fourth highest on record. The 20 warmest years on record have been in the past 22 years, with the top four in the past four years, according to the World Meteorological Organization (WMO). Other tell-tale signs of climate change, including sea level rise, ocean heat and acidification and sea-ice and glacier melt continue, whilst extreme weather left a trail of devastation on all continents, according to the WMO provisional Statement on the State of the Climate in 2018. It includes details of...

World Meteorological Day takes place every year on 23 March and commemorates the coming into force on 23 March 1950 of the Convention establishing the World Meteorological Organization. It showcases...

The ever-growing global population faces a wide range of hazards such as tropical cyclone storm surges, heavy rains, heatwaves, droughts and many more. Long-term climate change is increasing the intensity...

The Global Climate Observing System (GCOS) is a co-sponsored programme which regularly assesses the status of global climate observations and produces guidance for its improvement. It is co-sponsored by the...

As atmospheric CO 2 continues to increase, more and more CO 2 enters the ocean, which reduces pH (pH is a measure of acidity, the lower the pH, the more acidic the liquid) in a process referred to as ocean acidification. Declines in surface ocean pH due to ocean acidification are already detectable and accelerating.

A WMO International Workshop on the Global Review of Regional Climate Centre (RCC) Operations was held from 12 to 14 November in Pune, India, and hosted by the Indian Institute of Tropical Meteorology (IITM).

WMO hosted the first Symposium and User Summit of the Integrated Global Greenhouse Gas Information System (IG3IS), one of the recent initiatives of the WMO Global Atmosphere Watch (GAW) Programme, from 13 to 15 November in Geneva.

The World Meteorological Organization (WMO) and the Green Climate Fund (GCF) have signed a formal agreement to work together to leverage WMO expertise on weather, climate and water to increase effectiveness of GCF funded activities and support low carbon and climate resilient development.